JPH07187244A - Cushioning device using cylindrical body - Google Patents

Abstract

PURPOSE:To provide a cushioning device excellent in cushioning function and easy to dispose by a method wherein a plurality of cylindrical bodies are retained by a connector with their peripheral surfaces disposed in adjacent relation and are arranged at such a space as to bring the adjacent peripheral surfaces into contact with one another by the compressing and deformation. CONSTITUTION:A cushioning device 1 has a plurality of cylindrical bodies 3 arranged at suitable spaces between two sheet members 2 serving as a connector and fixed to the sheet members with adhesive agent. The cushioning device 1 can obtain the stress resulting from the deformation of each paper pipe occurring in its own way due to the compression of each cylindrical body 3. By further compression, the side parts of adjacent cylindrical bodies 3 make contact with one another, so that the contact area at the side parts thereof will become large. During this process, the stress increases describing a secondary curved line. For this reason, the cushioning device is so designed as to apply the load before buckling to the vertical contact part between the compressed and deformed cylindrical bodies 3, whereby the stress a few times that caused by the deformation of each cylindrical body 3 occurring in its own way by compression, together with a sufficient restoring function, is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushioning material using a tubular body made of paper, plastic, metal or the like.

[0002]

2. Description of the Related Art Generally, when packing electrical products or precision equipment, the purpose is to prevent the equipment from moving inside a cardboard box and to protect the equipment from shock during transportation and storage. The device is protected by storing it in a cardboard box together with a cushioning material.

As a conventional cushioning material, a foamed plastic such as styrene foam is widely used. The foamed plastic is a material having an excellent cushioning function for protecting the equipment, and can be easily molded according to the shape of various equipment, and has an advantage that the packing efficiency in the packaging material can be increased.

[0004]

However, although the foamed plastic material itself has extremely excellent properties, various problems have recently arisen in terms of treatment after being used as a cushioning material. For example, it is a big social problem that it is discarded as household waste because the collection route is undeveloped. In order to prevent this, handling at the time of collection takes time and the collection cost becomes high. In addition, when incinerating and discarding, it requires high energy, so maintenance of the incinerator is required. For this reason, especially in European countries, the current situation is that people are extremely reluctant to incinerate and do not use the foamed plastic itself.

In addition to this, the cushioning material made of foamed plastic is
Since it itself is extremely bulky, it has the drawbacks of low transport efficiency, high transport costs, and a large storage space. As a substitute for foamed plastic cushioning material, various paper cushioning materials made of corrugated cardboard have been developed. These shock absorbing materials can absorb only one impact, but when repeated impacts occur. Had a drawback that its buffering capacity was almost lost. Since the cushioning material that cannot withstand the impact repeated several times as described above is extremely unsuitable for being used for packing precision instruments, in the industry, as a substitute for foamed plastic,
There has been a widespread demand for the development of a cushioning material which has an excellent cushioning function and can be easily processed.

[0006]

Therefore, the present inventor has achieved the present invention as a result of earnest research in view of the above-mentioned problems, and is characterized in that a plurality of cylindrical bodies are provided around the periphery thereof. The surfaces are held by a connecting body in a state where they are adjacent to each other, and the tubular bodies are arranged at intervals such that the peripheral surfaces of the tubular bodies adjacent to each other are abutted against each other by at least the compression deformation received by the individual tubular bodies. There is something.

The term "cylindrical body" as used herein means a hollow member having a circular, elliptical, oval or polygonal cross section. As a material, any material may be used as long as it is made of paper, plastic, metal, or the like, and the peripheral surface thereof may be formed in a mesh shape. The relationship between the diameter and the wall thickness of the tubular body differs depending on the type of the tubular body and the number of the tubular bodies to be provided, but the wall thickness is generally 2 to 15% of the diameter of the cylindrical body.

The term "connecting body" means a member for holding a plurality of cylindrical bodies so that their peripheral surfaces are adjacent to each other. This is a case where, for example, an adhesive agent, staples, projections such as pins, and uneven portions such as grooves are provided and fixed or held on at least one surface of the sheet or board. In this case, as the connecting body, for example, corrugated board, cardboard, kraft paper, fiber, plastic plate, plastic sheet, metal plate, cloth, or the like, or a string or wire-shaped connection may be used. The cylindrical bodies may be fixed to one side of a connecting body such as a board, or may be provided on both sides. In this case, the cylindrical bodies may be provided in parallel on the front and back sides of the connecting body or in a staggered manner. Further, a tubular body may be provided between the two connected bodies.

As an interval for arranging a plurality of cylindrical bodies so that their peripheral surfaces are adjacent to each other, an appropriate gap may be formed or they may be provided in contact with each other. For example,
In the case where the tubular body is a cylinder, an interval of about 10 to 57% of its diameter is provided, and when a plurality of cylinders are compressed in a plane and their diameters widen, adjacent cylinders are brought into contact with each other. To As for the buffer performance in this case, the compression of the single cylinder is performed in the initial stage, and the stress gradually increases at the time when the cylinders come into contact with each other due to the compressive deformation, and compared with the stress of the same number of single cylinders. Several times more stress will be obtained. The "stress-strain rate curve" when the cylinders contact each other has stress characteristics similar to those of the foamed plastic cushioning material, and an extremely excellent cushioning capacity is obtained. Further, the stress characteristic curve can be arbitrarily set depending on the gap between the cylinders and the diameter and thickness of the cylinders.

The cylindrical body may be an elliptical shape other than a cylindrical shape, and in this case, the major diameter sides may be provided in contact with each other. In other words, this is a state in which the initial compression deformation of the cylinder itself is omitted when the cylinders are arranged with a gap. Of course, the cylinders may be provided in contact with each other, or the elliptical cylinders may be provided with a gap, but it is necessary to consider the problems of buckling and plastic deformation.

It is not necessary to fix all of the plurality of cylindrical bodies to the connecting body, and only the cylindrical bodies located at both ends may be fixed to the connecting body, or the intervals between the cylindrical bodies located at both ends may be widened. It may be regulated by a connecting body so that the pitch interval during compression can be generally maintained.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings.

FIG. 1 shows an embodiment of a cushioning body 1 according to the present invention, in which a plurality of tubular bodies 3 are fixed between two sheet members 2 as a connecting body at appropriate intervals. Is. The sheet member 2 of the cushioning body 1 is made of corrugated cardboard having a thickness of 3 mm, and the tubular body 3 has an outer diameter of 30 mm and an inner diameter of 2 mm.
A 6 mm paper tube is used, which is fixed to the upper and lower sheet members 2 with an adhesive at intervals of 12 mm.

The buffer body 1 can obtain a stress when each tubular body 3 is compressed and the paper tube itself is deformed as shown in FIG. 2 (a). Of course, the stress in this case is greatly affected by the number of paper tubes (effective working length), and the diameter of other paper tubes,
Depends on thickness and paper quality. Then, when further compressed from this state, the side portions of the adjacent tubular bodies 3 come into contact with each other, and the contact area at the side portion becomes large as shown in FIG. That is, the bending rate increases as the bent portion of the peripheral surface of the tubular body 3 sequentially moves in the vertical direction. In this process, the stress draws a quadratic curve and increases.
From this, by designing the vertical portion abutting by the compression deformation of the tubular bodies 3 to be a load before buckling, the tubular body 3 alone is independently compressed and deformed with sufficient resilience. More than several times the stress will be obtained. Also,
As a characteristic of the buffer body 1 using the tubular body 3, the portion where the tubular body 3 is present functions as a crushable zone, and also has extremely excellent performance as a cushioning member.

As another example of the cushioning body 1, as shown in FIG. 3, a tubular body 3 having an elliptical cross section is abutted on the sheet member 2 with no gap therebetween. This cushioning material 1 is shown in FIG.
The cylindrical bodies 3 are in line contact with each other by further compressing the one shown in FIG. Therefore, when a further load is applied to the buffer body 1, the state becomes equivalent to that of FIG. 2B, and the same effect as that of the above-described embodiment can be obtained.

The condition for increasing the resilience of the buffer body 1 is to prevent buckling at the portion where the peripheral surfaces of the adjacent tubular bodies 3 contact each other as much as possible. As a practical matter, it is conceivable that the tubular bodies 3 are not evenly loaded, and the bending rate of the peripheral surface increases at an early stage to cause buckling. Therefore, as shown in FIG. 4, the direction in which the tubular bodies 3 are provided may be changed to mutually suppress the inclination of the load applied to each tubular body 3. In other words, the component force of the load in the circumferential direction applied to the tubular body 3 is canceled by the tubular body 3 fixed in the axial direction which is the same as that direction. In this example, two tubular bodies 3 are set as one set with respect to a plurality of tubular bodies 3 arranged in the horizontal direction, and the two tubular bodies 3 are provided in a direction orthogonal to the left and right. Of course, it may be provided not only in the orthogonal direction but also in the oblique direction. Further, the inclination of the load may be controlled by another member or method regardless of the tubular body 3.

The buffer 1 may be formed in an L shape as shown in FIG. This is one in which the tubular body 3 is fixed in a state in which the two sheet members 2 are bent in an L shape, and is used, for example, for protecting the corner portion of the stored items. In this case, it is preferable that the load applied to one of the cylindrical body 3 provided in the vertical direction and the cylindrical body 3 provided in the horizontal direction in the figure does not act on the other. Therefore, it is not necessary to provide either the inner or outer sheet member 2. Alternatively, for example, the inner sheet member 2 and the vertical tubular body 3 may not be fixed, or the inner sheet member 2 may be separated.

Further, as shown in FIG. 6, the tubular body 3 having a short length or cut into an appropriate length is fixed to the sheet member 2 in series as shown in the drawing, and is fitted to the cut portion. Alternatively, the cuts 4 may be provided in the upper and lower sheet members 2. In the buffer body 1 shown in this example, the buffer body 1 having an appropriately required size can be easily obtained by cutting the buffer body 1 at the cut portion 4. Also, the upper sheet member 2
It is also possible to use it as the L-shaped cushioning material 1 by cutting only the cut 4 and bending the cut 4 portion of the lower sheet member 2 downward. Therefore, if the tubular body 3 is cut into an appropriate length, it can be cut with a knife or the like or bent at an arbitrary position without providing the cut 4 in the sheet member 2. When the tubular body 3 is cut, it may be fixed to the upper and lower sheet members 2 and then cut while leaving either one of the upper and lower sheet members 2.

In addition, as shown in FIG. 7, in the case of the buffer body 1 having a structure in which a plurality of tubular bodies 3 are fixed to one surface of a sheet member 2 as shown in FIG. It can be bent and used at any place of 2, and can be used at any part of a stored item such as a corner portion of the stored item.

The tubular body 3 may be fixed to one side of the sheet member 2 or may be fixed in parallel to both sides of the sheet member 2 as shown in FIG. 8 (a). Alternatively, the sheet members 2 may be fixed in a zigzag manner on both sides as shown in FIG. In the case of this cushioning body 1, when packed in the packing material, the cylindrical bodies 3 are arranged in a line with an appropriate interval as shown in FIG. 7C, and the same effect as that of the cushioning body 1 described above is obtained. Will be done.

[0021]

As described above, the shock absorber according to the present invention is one in which a plurality of tubular bodies are held by a connecting body such that their peripheral surfaces are adjacent to each other, and at least within the elastic range at the time of compression and pressing. Since the peripheral surfaces of adjacent cylindrical bodies are arranged at the positions where they abut each other, the stress gradually increases when the peripheral surfaces abut each other during compression deformation. Thus, the stress characteristics are almost the same as those of the cushioning material made of foamed plastic, and the cushioning material can exhibit an extremely excellent function. Further, since the tubular body has elasticity and internal loss, it has an effect of having a so-called cushioning function in addition to the spring effect. Further, the structure is simple and the manufacturing cost is low, and it is possible to easily match the shape of the stored items in the packing material.
Further, the cushioning material of the present invention can be made of a material such as paper, has no problem in processing after use as a cushioning material, and can be reused, and has an extremely excellent effect on the environment. I have.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a shock absorber according to the present invention.

2 (a) and 2 (b) are side views showing a compressed state of the shock absorber shown in FIG. 1, respectively.

FIG. 3 is a side view showing a cushioning body using an elliptic cylindrical body.

FIG. 4 is a plan view showing another example of the arrangement of the tubular bodies.

FIG. 5 is a side view showing an example of an L-shaped buffer body.

FIG. 6 is a side view showing another embodiment of the buffer body.

FIG. 7 is a side view showing another embodiment of the cushioning body.

FIG. 8 is a side view of a buffer body in which paper tubes are provided on both sides of a sheet member, (a) being a side view of side-by-side arrangement, (b) being a side view of staggered arrangement, and (c) being a side view. It is a side view which shows the state which made the thing of (b) one row.

[Explanation of symbols]

 1 cushioning body 2 sheet member 3 tubular body 4 cut

Claims (2)

[Claims] 1. A plurality of tubular bodies are held by a connecting body in such a manner that their peripheral surfaces are adjacent to each other, and the tubular bodies are at least one of the tubular bodies that are adjacent to each other due to compressive deformation received by each of the tubular bodies. A cushioning body using a tubular body, characterized in that the circumferential surfaces are arranged at intervals so as to abut against each other. 2. A tubular body is provided at a lateral portion on the end portion side of the plurality of tubular bodies with a circumferential surface abutting against the end portions of the plurality of tubular bodies by compression deformation. A buffer body using the tubular body according to claim 1.